feat(skill-learning): merge plugin skill updates

app-instance/backend/beaver/skills/specs/models.py

@@ -180,6 +180,7 @@ class SkillDraft:
     status: str = SkillReviewState.DRAFT.value
     evidence_refs: list[dict[str, Any]] = field(default_factory=list)
     proposal_kind: str = "revise_skill"
+    provenance: dict[str, Any] = field(default_factory=dict)
 
     def to_dict(self) -> dict[str, Any]:
         return {
@@ -196,6 +197,7 @@ class SkillDraft:
             "status": self.status,
             "evidence_refs": list(self.evidence_refs),
             "proposal_kind": self.proposal_kind,
+            "provenance": dict(self.provenance),
         }
 
     @classmethod
@@ -214,6 +216,7 @@ class SkillDraft:
             status=str(payload.get("status") or SkillReviewState.DRAFT.value),
             evidence_refs=list(payload.get("evidence_refs") or []),
             proposal_kind=str(payload.get("proposal_kind") or "revise_skill"),
+            provenance=dict(payload.get("provenance") or {}),
         )